Sole-sewing machine



(No Model.) 7 Sheets-Sheet 1.

L. GODDU.

SOLE SEWING MACHINE.

No. 581,819. Patented May 4,1897.

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(No Model.) 7 Sheets-Sheet 2.

L. G ODDU. SOLE SEWING MACHINE.

No. 581,819, Patented May 4, 1897.

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SOLE SEWING MACHINE.

No. 581,819. Patented May 4,1897.

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L. GODDU.

SOLE SEWING MACHINE.

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L. GODDU.

SOLE SEWING MACHINE Pat e nted May 4,1897.

(No Model.') L 7 Sheets-Sheet 6 SOLE SEWING MAQHINE.

No. 581,819. Patented May 4,1897.

(No Model.) 7 Sheets-Sheet 7. L. GODDU. SOLE SEWING MACHINE.

No. 581,819. Patented May 4,1897.

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lhviTEn STATES PATENT UEETcE.

LOUIS GODDU, ()F VINGHESTER, MASSACHUSETTS, ASSIGNOR TO JAMES W. BROOKS,TRUSTEE, OF PETERSTTAM, MASSACHUSETTS.

SOLE-SEWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 581,819, dated May 4,1897. Application filed January 2, 1896. Serial No. 574.042. (N model.)

To all whom it may concern:

Be it known that I, LOUIS GODDU, of Winchester, county of Middlesex,State of Massachusetts, have invented an Improvement in Sole-SewingMachines, of which the followin description, in connection with theaccompanying drawings, is a specification, like letters and figures onthe drawings representing like parts.

This invention relates to shoe-sewing machines, and particularly tomachines of that general class adapted to unite the outer sole to thewelt of what is commonly known as welted boots and shoes by theinterlocking of two threads forming the usual lockstitch.

In this invention the position within the work of the interlockingportion of the threads for each stitch is determined by or through theshuttle-thread, a fixed length of such thread being measured or drawnoff prior to the formation of each stitch, irrespective of the thicknessof the work, the needle-thread accommodating itself to such variation inthickness.

By the invention to be hereinafter described the shuttle or bobbinthread, after it has been drawn off or measured, is locked during theremainder of the stitch formation, so that 0 the interlocking portionsof the two loops of thread will always be at a fixed distance from theupper surface of the work, which latter rests upon a stationarywork-support.

The needle-thread is laid in the open hook 5 or barb in one side of apreferably curved needle by a looper cooperating with a threadguideinclined in front of and across the needle-path, the looper andthread-guide bein g mounted upon or carried by the work-sup- 0 port, theinclination of the thread-guide tending to draw the thread directlyintothe needlehook.

Figure 1 is a front elevation,partiallybroken out, of a sole-sewingmachine embodying my 5 invention, the lower part of the head or frameand its supporting-standard being omitted. Fig. 1 is a detail sectionalview taken 011 the line .r on, Fig. 1, of the feed-regulating mechanismto be described. Fig. 2 is a top or plan view of the machine shown inFig. 1, the balance-wheel and clutch being partially broken out to showthe construction more clearly. Fig. 3 is a vertical sectional view takenon the line 01; :13, Fig. 1, looking to the right. Fig. 3

is a transverse sectional detail on the line :0

:0 Fig. 3, of the tension device on the takeup lever enlarged. Fig. 3"shows details of the tension device and its support. Fig. 4: is

a vertical sectional view on the line m 00 Fig.

2, looking to the left. Fig. 5 is a perspective view of the awl andawl-segment. Fig. 6 is a similar view of the needle, needle-segment, andneedle-hook guard. Fig. 6 is a side elevation of the needle and awlsegments in position side by side. Fig. 6 is a perspective detail of thestop for the needle-guard. Fig. 7,

on an enlarged scale, in front elevation, shows the bobbin-carrier,worlcsupport, and presserfoot, the needle and awl being retracted, thebobbin-carrier being stationary and protect- 7o ing the point of theneedle. Fig. 8 is a like view of the stitch-forming devices, the presserbeing omitted, the awl being shown as in and having fed the work, thebobbin-carrier having been moved in the direction of the arrow 8 touncover the needle; Fig. 9, a similar view, but showing the needle asentering the work and about to have the loop of needle-thread placedwithin its hook or barb by the looper. Fig. 10 shows more clearly themovement of the needle-thread by the looper, the latter having passed tothe rear of the needle. Fig. 10 is a side view of the parts shown inFig.

10 with the looper-Iat two points in its path of movement. Fig. 11 showsthe bobbin-carrier as moving in the direction of the arrow 11 to takefrom the needle its loop of needlethread, the needle being shown asnearly at the upper end of its path of movement. Fig.

12 shows the position of the parts after the bobbin-carrier has madenearly a complete revolution in the direction of the arrow 12, carryingthe loop of needle-thread around the bobbin-carrier and thebobbin-thread, a fixed or measured length of the latter having 5 beendrawn off, as will be described, and locked from further delivery untilthe stitch is set. Fig. 13 is a perspective view of the looper detached.Fig. leis a transverse sectional View of the bobbin-carrier and itsbobioc bin, taken on the line y 1 Fig. 11. Fig. 15

is a top or plan view of the wax-pot. Fig. 16

is a perspective view of the bobbin-carrier, bobbin, and removable endfor the carrier. Fig. 17 is a side elevation of the bobbin-carrier,looking toward the loop-taking point. Fig. 18 is a perspective view ofthe looperactuating cam, and Fig. 19 is a detached detail view inelevation of the presser-controlling mechanism.

Referring to Figs, 1, 2, and 3, the head or frame A, of suitable shapeto sustain and provide bearings for the operative parts of the machineis mounted upon a suitable standard or column, (not shown herein,) saidhead having bearings A for a main shaft B, to which, as best shown inFig. 2, is rigidly secured by a suitable set-screw 2 a fly or balancewheel B, having secured to or forming a part of it one member, as 13 ofa preferably coned friction-clutch, the other member B of the clutch,loose on the said shaft, being ,shown as adapted to receive a belt orband to be continuously rotated, the clutch members being normallyseparated by a spring S in usual manner. (Shown only in Fig. 2.)

Between the hub B of the movable clutch member and the adjacent bearingA is inserted a sleeve B having serrated or cam faces to engage suitablecorresponding camfaces A secured to or forming a part of the bearing,partial rotation of the sleeve B by means of a link B, operated by asuitable treadle (not shown) and connected at its upper end to an arm Bof the sleeve, throwing the clutch into operative position, release ofthe treadle permitting the spring S to throw the clutch out ofoperation.

The head A has in its upper front portion a long bearing, a portion ofwhich is shown at A to receive therein a shaft a, bored outlongitudinally at one end (see dotted lines, Fig. 1) to receive thereina spring 3, held in place by a threaded nut a screwed into the outer endof the bearing A tending to normally press the said shaft to to theright, viewing Fig. 1, against the cam-shaped end a of a vertical shafta mounted in an upright bearing A of the head and provided at its upperend with a suitable handpiece a by which the vertical shaft a may beturned more or less to present different portions of its cam end a tocontact with the end of the longitudinally-movable shaft a.

Preferably the upper end of the bearing A will be graduated or providedwith a scale, as shown in Fig. 2, to indicate the position of thecam-stop a.

The slide-shaftcthas secured thereto a suitable roller 0r otherstud a(see Fig. 3,) held against an edge cam a on the cam-disk 0, having awedge-shaped cam portion a thereon to contact with the stud or roll aand thereby move the shaft a to the left, Fig. 1, to effect the feed ofthe work, as will be described, the spring 8 returning the shaft toposition against the stitch-regulating cam a, it being understood thatthe smaller the return movement of the shaft the shorter will be thefeed and length of stitch, and vice versa.

The shaft a has rigidly secured thereto like arms a, (see Figs. 3 and4,) extended forwardly through the slotted open front of the head orframe A and provided with bosses a and a", adapted to slide in bearings25 in the head, the boss a (shown on the left-hand arm, Fig. 1) beingthe larger of the two to receive the enlarged end b of a rock-shaft 6,(see Fig. 5,) which has rigidly secured thereto the awl-segment Z),carrying a curved awl 11 upturned to penetrate the work from below, thebearing to preventing longitudinal movement of the shaft b and partssupported thereby in one direction.

The needle 0, herein shown as curved and having an open hook or barb atone side near its end, is rigidly secured to a needle-segment 0, havinga laterally-extended hub 0 (clearly shown in Fig. 6,) the said hub beingadapted to receive and turn freely upon the shaft 1), while aneedle-hook guard 0 forms part of a split hub or boss c frictionallysecured upon the hub of the needle-segment by a suitable set-screw 0 Theneedle-segment and hookguard are mounted upon the shaft Z) between theawlsegment Z) and the boss a and consequently all of the parts carriedby the arms a must move in unison laterally during the feed of the work,while the needle and awl have an oscillatory motion given them by meansto be described.

The hub c of the hook-guard is cut away to form a notch 0, having at oneend a shoulder 0', which engages the inturned lug c of a guard-stop c,(shown separately in Fig. 6 to thereby stop the hook-guard, the saidguardstop 0 being attached to the boss a bya suitable screw, as 20, Fig.1.

Vhen the needle is retracted, the friction between the guard-hub c andthe needle-segment hub o will carry the hook-guard back with the needleuntil stopped byengagement of the shoulder a and lug c and when theneedle has completed its backward throw its hook will be covered andcompletely protected by the guard, as shown in Figs. 3, 6, and 6.

When the needle moves forward toward the work, the hook-guard movesfrictionally therewith and will ordinarily engage the work and will bestopped thereby, the needle continuing to move forward into the work,with its hook uncovered, the guard at such time acting to guide theneedle.

If the work should be very thin, the guard 0 will be stopped in itsforward movement by engagement of the guard-stop with the opposite endof the notch c in the hub 0 A horizontal rod or shaft D is supported inbearings A at the rear upper part of the head, and the take-up andneedle and awl actuators are mounted to rock thereupon, theneedleactuator being shown as a lever 01, Fig. 3, having a longsleeve-like hub d, through which ICC the shaft D is extended, said leverhaving a segment-gear d thereon at its front end to engage the toothedneedle-segment c, said lever being provided with a suitable roller orother stud (Z (see Fig. 3) to enter a cam-groove (7" (shown mostly infull lines in Fig. 3) in the face of the cam-disk C, said cam beingrotated in the direction of the arrows 30, Figs. 3 and a.

The shape of the cam-groove d is such that the needle will be retractedto draw out the loop and be held so that the point of the looptaker mayenter and take the loop of needlethread out of the book of the needle,and then the part (Z of the groove further retracts the needle toconceal its open hook within the hook-guard it being retained in suchposition while the bobbin-carrier is rotated to illterlock the bobbinand needle threads, the needle remaining in such position until the awlhas again entered the work, fed it forward, and begun its withdrawal.This concealment or covering of the point of the hook obviates anypossibility of the needle-thread catching against the hook of theneedle, fraying or wearing it, as the needle-thread is passed about thebobbincarrier in the formation of the stitch.

Referring now to Figs. 2 and i, an arm 6, having an elongatedsleeve-like hub e loose upon the shaft D, is provided at its front endwith a toothed segment 6 to engage the teeth of the awl-carrying segmentb to impart the proper oscillatory motion to the awl, said lever havinga suitable roller or other stud e thereon to enter a cam-groove e in theinner face of a cam-disk E fast on the main shaft, whereby the awl isoscillated at the proper time to enter and recede from the work, thesaid hubs cl and 6 being located at opposite sides of the take-up, tobedeseribed.

The work-rest is shown as an upturned portion F of the head, preferablyrounded at its upper end and forming at an acute or beveled edge toenter between the welt and the upper as the work is supported, it beingunderstood that the boot or shoe is held upside down upon the work-restwith the outer sole uppermost.

The needle-thread t is led from the take-up about a guide-sheave f atthe lower end of the work-support and thence along a longitudinal groovef formed in the outer face of the said work-supportand flared. orenlarged at the upper end, the work-support being cut away thereat, asshown best in Fig. 7, to leave a downwardly-inolined edge f extendingacross the plane of and in front of the needle path.

The needle-thread as it is delivered to the needle by the looper passesfrom the enlarged upper end of the guidegroove f over the guide edge fto the interior of the work-rest and up through the needle-openingftherein, (shown clearly in Figs. 3 and 4,) the awl also passing throughsaid opening f to penetrate the work from below.

The work-support is recessed near its lower end, and a spring-hook f islocated therein, about which the thread is passed to aid in keeping ittaut as it passes up over the outer side of the work-support shouldthere be any irregularity in the movement of the take-up.

The looper Z (shown separately in Fig. 13) is notched at P at its upperoffset end to engage the thread, and it is attached to an arm Z,extended up within the hollow work-support F and rigidly secured to arock-shaft Z rotatable and longitudinally movable in a boss or hub-likebearing A, (see Fig. 1,) extended laterally from the lower part of theworksupport.

The rock-shaft Z is provided with an arm Z upon .which is mounted aroller Z held by a spring 8 against an edge cam Z on the periphery ofthe cam-disk 0, (see Figs. 2 and 1S and dotted lines, Fig. 3,) theraised portion Z of the cam acting upon the roller Z to rock the shaft Zand thereby move the looper rearwardly from the front of thework-support to thereby carry the needle-thread t back past the path ofthe needle.

The hub of the arm Z has a stud Z provided with a roll Z (see Fig. 1 anddotted lines, Fig. 3) at right angles to the roll Z and held by thespring 8 in engagement with a face-cam Z on the outer face of the disk0.

The raised portion Z of the cam moves the looper to the right, viewingFig. 7, into position to meet the needle-thread, and thereafter thelooper is moved to one side of and within the are of the needle-path, asin dotted lines, Fig. 10, so that the needle when it descends may passin front of the looper and between it and the inclined thread-guide f\Vhile the needle remains in the work, as in Fig. 10, the part Z of camZ moves the looper to the rear, and at the same time it is moved to theleft back of the needle, so that the thread is drawn down the inclinedthreadguide f into the open hook of the needle, which rises as thelooper returns to its normal position near the front of thework-support.

The movement of the looper to the rear and left hand described alsoserves to measure or draw off a sufficient length of thread from thetake-up to form one side of the loop, the looper giving up the thread tothe needle as the latter rises into position to have its loop removed bythe point of the loop-taker. This drawing off of the thread by thelooper pre vents rending of the thread through the needle-hook as thelatter rises, a point of the utmost importance in a machine running athigh speed, for the rending of the thread in the needle-hook will frayor break it.

A presser P, to be more fully described hereinafter, clamps the workfirmly upon the work-support as the awl b ascends therethrough,releasing the work when the work is to be fed forward by the lateralmovement of the awl due to the wedge a acting on the roller a, as hasbeen described, and then 4 again clamping the work as the awl iswithdrawn and the needle comes forward to enter the awl-hole and receiveits loop of needle-thread.

Above the work-support the head is cut away to form a nearly circularrecess 9 to receive therein the intermittingly rotatable bobbin-carrier.(Shown in section in Figs. 3 and 4 and on a larger scale in Figs. 14:,16, and 17.)

The bobbin-carrier is discoidal in shape, having a substantiallycircular closed end h, the annular side walls h and h of the bodyportion flaring oppositely from the ends of the body and being cut outinteriorly from near the heel to near the point of the carrier, as shownin Fig. 14, to reduce weight.

At the greatest circumference of the side walls is formed a cylindricallip or flange 77. concentric to the axis of the bobbin-carrier, theinner and outer faces of the flange forming bearing-surfaces to supportthe bobbincarrier in its movements.

A hollow stud k is erected on the inner side of the closed end h of thebobbin-carrier,

and it is longitudinally slotted at h to permit a bent spring 8 withinthe stud to project therefrom and engage the hub of a bobbin Zc, uponwhich the bobbin-thread t is wound, the bobbin being slipped on orremoved from the stud h when the removable end or cover it of thebobbin-carrier is removed. This removable end h is retained in placewhen the bobbin-carrier is in operation by a retaining device (shown asan elongated metallic plate h secured thereto, one end of the platebeing made as a spring h to pass within a notch 77. in the side wall ofthe bobbin-carrier, while the other end is bent over and laterallygrooved to pass through a second notch h in the side wall of and entersome distance within the bobbin-carrier, as at 71. at one side of thebobbin.

As shown in Fig. 14, the bobbin-thread guide h draws the bobbin-threadover from the side of the bobbin, free rotation of which is prevented bythe spring .9 so that overrunning or entangling of the thread isprevented, a positive pull thereon being necessary to draw off themeasured or fixed quantity for the formation of each stitch. A hole inthe inner extremity of the bent portion 72 receives the bobbin-threadand acts as a guide therefor, the thread being led thence to alongitudinal groove or recess h in the outer side of the plate 71?, (seeFig. 12,) said groove terminating in a hole leading to the under side ofthe plate. The thread passes through this hole under the plate and thenout again through a hole h eccentric to the center of rotation of thebobbin-carrier, so that supposing the starting position of thebobbincarrier to be either as shown in Figs. 8, 9, or 10 movementtherefrom in the direction of the arrow 11, Fig. 11, until the hole 71occupies its highest position relative to the work-support will draw offa measured or fixed length of bobbin-thread from the bobbin to providethe requsite bobbin-thread for the next stitch. The body of thebobbin-carrier and the flange h are cut away at h, Figs. 16 and 17, forthe entrance of the actuator h, to be described.

One end of the flange 71 thus cut away is inwardly beveled at 77.gradually from the part h of the side wall and reduced longitudinally inwidth (see Fig. 17) to form a hook or loop-taker, the gradual increasein width from the point 71 of the hook to the full width of the flange halong the edge h Fig. 17, acting to lift the loop out of the hook of theneedle, while the upwardly and rearwardly inclined edge 71, of the saidhook acts to spread the loop of needle-thread as the bobbin-carriercontinues to move in the direction of the arrow, Fig. 11.

As the bobbin-carrier continues to move in such direction after havingthus removed the loop of needle-thread from the needle the latter willbe withdrawn by its actuating mechanism into the position shown in Fig.3 with its hook concealed, and the loop of needle-thread is carriedaround the bobbin-carrier to be interlocked with the portion ofbobbin-thread which is simultaneously measured off, so that when thehook or loop-taker arrives at the position shown in Fig. 12 the'loop ofneedle-thread is being drawn off from the bobbin-carrier by the take-up,the measured portion of bobbin thread passing therethrough being at suchtime slack and looked, as will be described, so that no more can bedrawn from the bobbin for that stitch.

As the loop of needle-thread is drawn down into the work W it willinterlock with the measured or fixed length of bobbin-thread t, and theinterlocked portion of the two loops, as 15*, will be drawn into thework a certain distance below its upper surface on the bottom of achannel made therein, said distance being regulated by the length of thebobbinthread measured or drawn off.

As the measured portion is always of the same length for each and everystitch, it follows that the interlocked portion 25 of each and everystitch will be located within the work at substantially the samedistance from its outer surface, in this instance the upper surface-thatis, the bottom surface of the outersole of the finishedshoeanyinequalities in the thickness of the work being accommodated bythe needle-thread.

The needle after the loop of needle-thread has been removed therefrom isretracted into the position shown in Fig. 3,with its point between andprotected by the flange 71, and the adjacent wall of the bobbin-carrier,while the hook-guard 0 covers the opening of the hook.

Above the recess 9, as herein shown, a circular groove or race g isformed in the face of the head A to receive the flange h of thebobbin-carrier to sustain it in position to be intermittinglyoscillated, a curved retainingplate g secured to the head by suitablescrews g projecting over the part h of the side wall of thebobbin-carrier and retaining it in place.

Referringto Fig. 17, I have shown the flange 7L2 near its heel as cutaway to leave a clearance 7L to permit the loop of needle-thread to passover and about the bobbin-carrier as freely and easily as possible asthe take-up comes forward to permit it.

Referring to Fig. 3, a shaft h is supported in bearings in the head andextends forward into the recess g behind the bobbin-carrier, said shafthaving at its front end a laterallyeXtended arm h upturned or flanged ath (see Fig. 1) to enter the cut-away portion of the carrier-body and itsflange 7&2 to actuate said bobbin-carrier as the shaft 71 is oscillated.

It will be seen in Fig. 3 that the loop of needle-thread can passreadily around the bobbin-carrier and between it and the arm 71. of thecarrier-actuator, the latter having fast thereon a long pinion h inengagement with a toothed segment 71 formed on one end of a leverfulcrumed in the frame at 7t and provided with a roller or other stud h,en tering a peripherally-grooved cam W secured to or forming a part ofthe outer side of the cam-disk E, the shape of the cam-groove being suchthat the bobbin-carrier will be oscillated intermittingly at the propertime to take the loop and then to release it in the formation of thestitch.

Between the sleeve-like hubs d and e on the shaft D is clamped, by aset-screw 70 or in other suitable manner, the take-up lever 071-, shownin Fig. 3 as bent between its ends and having secured thereto, adjacentits fulcrum, a toothed segment on in engagement with the teeth of asegmental gear m of an arm m fast on a rock-shaft M, said rock shafthaving fast thereto a second arm m, (see dotted lines, Fig. 3,) providedwith a roller or other stud m to entera cam-groove m (shown in fulllines) in the face of the cam disk or hub O, rotation of the latterrocking the shaft M and thereby the take-up lever to swing its free endforward and upward as the loop of needle-thread is carried around thebobbin-carrier and to thereafter withdraw the take-up into the positionshown in Fig. to tighten the stitch.

The needle-thread is drawn from a suitable wax-pot P adjacent the saidtake-u p, the thread passing from the wax-pot through a clamp or tensiondevice, shown as a spring .9 on the take-up near its fulcrum, and thencearound suitable grooved sheaves m and m on the lever m, to andcompletely around a tension thread-sheave a, mounted on the free end ofthe take-up, from which the needlethread passes to the guide-sheave fand the stitch-forming devices described.

An enlarged sectional view of the tensionsheave is shown in Figs. 3 and3 wherein a stud m projecting from the outer face of the take-up leverm, passes through the hub of the light sheave n.

The arm on has upon its side about the stud m a series of concentricrings or projections m and the adjacent face of the sheave has a likeseries of rings or projections an, arranged to enter the spaces betweenthe rings on the arm, and between these faces I have arranged a suitablewasher 10 The rings or projections add materially in supporting thesheave on the arm and reduce the strain thereof on the stud m Upon theouter threaded end of the stud is screwed a nut 71, having ratchet-teeththereon to be engaged by a suitable spring-detent n to preventaccidental rotation of the nut, the detent being carried, as shown inFig. 3, on an arm on, secured to the take-up lever and having a holetherein through which the stud 'm is passed, a second friction-washer 10being interposed between the said arm m and the hub of the sheave, allof the parts weighing very little, to reduce the effect of momentum.

By screwing the nut a up more or less tightly the friction upon thesheave n is regu lated to yield more or less freely to the strain of thethread, the detent n maintaining the tension adjusted.

It will be seen from Fig. 3 that the thread between the clamp 8 and thetension-truck is always maintained taut and so prevented from flyingabout in the movement of the take-up or from catching in any of theadjacent parts of the mechanism.

The tension of the sheave it having been adjusted on the forwardmovement of the take-up, a quantity of thread will be drawn from thewax-pot P more than suflicient to provide for the next stitch, and asthe takeup in its return movement draws the thread taut, if thethickness of the work should require more than the average quantity ofneedle-thread drawn off, the excess required will be drawn from theslack between the waxpot and clamp 5 the sheave turning the necessaryamount.

No matter how rapidly the machine may be run it is impossible for thethread on the take-up to become displaced or caught in adjacent parts,and by making the devices at the end of the long take-up lever verylight I am enabled to overcome the effects of momentum thereupon.

It will be evident from an inspection of Fig. 3 that the thread is freebetween the tensionsheave n and the work-support, and the tension-sheavebeing located at or near the extremity of the take-u p lever m I amenabled to make a long throw or stroke of the latter take the place of ashort throw and intermediate multiplying devices. \Vith the long throw,if the take-up lever and parts carried by it should be heavy, themomentum would be so great that it would be added to the effect of thetension and it would be impossible to form the stitches evenly anduniformly with any speed.

In Fig. 16 I have shown two wax-pots P and P the former for theneedle-thread and the latter for the bobbin-thread, said wax-pots beingheated, preferably by steam exhausted therefrom through pipes 19 19,respectively branching from a common exhaust P leading to a suitablepoint of discharge. The bobbin-thread is only drawn from its wax-potwhen winding a bobbin, and it is therefore desirable to be enabled toturn Off the heating medium from said wax-pot when not in use, and forthis purpose I have inserted in the branch pipe 19 a suitable valve ato, so that such pot can be disconnected from the exhaust independentlyof the pot P. So, too, in order to cutoff the needle-thread wax-pot P, Ihave interposed a valve 1; in the branch 19, so that it can be cut offwhen desired from the exhaust. A common union-inlet p connects the frontends of the wax-pots and a pipe 13 leads thereto from a hollow curvedheater 1], having a plane outer face, against which the take-up leverslides, in order to maintain the thread soft on its way to thestitch-forming devices, Fig. 3 showing clearly the proximity of thethread to the heater 19 between the tension-sheave n and theguide-sheave f when the take-up is retracted, the front end of theheater extending up to the base of the-worksupport.

Referring now to Fig. 1, the front of the head A is provided with a ductor passage 19, (see dotted lines,) connected at its lower end by a pipe19 t0 the upper front end of the heater p to conduct the steam or otherheating medium thereto after passing through the head adjacent thestitch-forming devices, said duct or passage 19 passing through the rearof the work-support and near the recess in which the bobbin-carriermoves to maintain the latter heated, the pipe 12 serving to conduct thelive steam to the head.

Referring now to Figs. 1, 2, and 3, the head of the machine is upturnedat A and l0ngi tudinally slotted to receive therein a slide block 19normally depressed by a spring 5 controlled as to its tension by asuit-able nut P (shown only in Figs. 1 and 2,) said slideblock havingsecurely bolted thereto the presser-foot or presser P. The slide-blockextends through the bearing A at the rear, as shown in Figs. 2 and 3,and has formed thereon two sets of oppositely-inclined or reversedratchet-teeth p and p (see Fig. 19) in vertical alinement with eachother, coopcrating, respectively, with two pawls 13 19 mounted on a stud500 in the slotted pawlcarrier 19 rigidly secured to a horizontalrock-shaft N, mounted in bearings A of the head, said rock-shaft, asshown in Figs. 2 and 4, having fast thereon a lever p provided with aroller or other stud p to enter a facecam groove p in the cam-disk E, asclearly shown in Fig. 4, the shape of the groove being such that thepresser will be positively lifted during the feeding of the work by thepart of the cam between the points 200 and 201 and thereafter depressedby its spring and held clamped upon the work between the points 201 and202 while the needle descends through the work and is retracted, afterwhich the lock on the presser is released until the awl is about toenter the work, as between the points 202 and 203 of the cam, at whichtime the presser is again clamped or locked positively upon the workbetween the points 203 and 200 of the cam. The two pawls p and p areoppositely extended to engage with one or other of the series ofratchetteeth p or p A shield 90, fixed on a part of the main frame,covers more or less of the teeth 13 according to the thickness of thework, so that when the pawl-carrier p is raised, it having a constantthrow, the presser will always be raised the same distance above thework, no matter what the thickness of the latter, for the thicker thework the lower down upon the ratchet will the pawl 13 engage, as more ofthe teeth will be uncovered by the shield in such case, and vice versa.WVhen the pawl-carrier descends, due to the cam-groove p the pawl willengage the first uncovered tooth of the ratchet 19 said ratchet alsohaving a shield 92 projecting from the main frame to lock thepresserpositively upon the work, the spring 5 being more or lesscompressed according to the thickness of the work. WVheu the work isthick, the pawl p will not in its downstroke engage a tooth ofv theratchet 13 until it reaches nearly the end of its stroke, owingto theshield 92. If the work bev thinner, the pawl will engage a tooth higherup on the ratchet, as more of the latter will be uncovered by the shield92. A saddle p bearing equallyon the two pawls, is held against them bya spring-pressed pin p in the pawl-carrier to maintain the pawls alwaysin position to engage a ratchet-tooth of one or the other series at theproper time. A hand-lever p is fulcrumed on the shaft N and is providedwith an offset toe p to engage a suitable projectionp on theslide-blockp in order that the presser may be lifted by hand to insertthe work when the pawls are in the intermediate position, the presserbeing then unlocked.

As shown best in Figs. 2 and 4, a rod 7" is mounted to slidehorizontally in a suitable bearing A of the main frame, said rod havingdepending therefrom at its front end an arm r, carrying a pad r which islocated opposite to the delivery-opening 72, of the bobbin-carrier whensaid opening reaches its highest point, a spring 3 surrounding theslide-rod 0 between the hearing A and an adjustable nut r on the rod,tending to retract said rod and bring the pad r tightly against the saidthread-delivery opening as the take-up is completing the stitch, as hasbeen described, to lock the bobbin-thread ICO from being drawn off atsuch time from the bobbin. The slide-rod is pivotallyconnected at 7' toa bell-crank lever 0' the sleeve-like hub r of which is mounted to rockupon the laterally-extended hub m of the take-upactuating arm m saidbell-crank lever 0' having thereon a roll 1, held in engagement with theperiphery of the cam-disk E, said cam-disk, as shown in Figs. 1 and a,having a depression 0' therein for a portion of its length to receivethe roll, thereby permitting the spring 5 to move the locking-pad 7*against the bobbin-thread to lock it as the interlocking portions of theloops of needle and bobbin thread are drawn into the work by theloop-taker. The pad 0- and its actuating mechanism form abobbin-thread-locking device, for the purposes hereinbefore described.

To prevent any accidental catching of the loop of needle-thread as it iscarried around the bobbin-carrier with the bobbin-thread, which mightaccidentally draw off from the bobbin an additional portion of thread, Ihave placed a guard 7L adjacent the thread-delivcry 72 projecting fromthe face of the cover, to lift the adjacent part of the needle-threadloop over the bobbin-thread at the deliveryopening.

Themachine forming the subjectanatter of this invention is strong andpositive in its operation, comprises a comparatively small number ofparts, and may be run at a very high speed without destroying thepositive and exact operation of all the stitch-forming devices.

My invention is not restricted to the precise construction andarrangement of parts herein shown and described, as it is obvious thatvarious changes or modifications may be made therein without departingfrom the spirit and scope of my invention.

By reversing the location of the needlehookthat is, placing it at theopposite side of the needle and rotating the hook in the reversedirection from that shown a lockstitch with a knot at the crossing willbe formed.

The take'up mechanism and thread-tension devices cooperatingtherewith,the presser and its controlling means, the adjusting mechanismfor the shaft which supports the feedingawl, the rotating shuttle havinga stationary face plate provided with a thread -delivery and an externalthread guide, with which cooperates a lockin g device movable toward andfrom the guide to control the delivery of the shuttle-thread, thework-support provided with the peculiar thread-guide and the cooperating looper, and the continuously-rotated shuttle having a peripheralflange at the rear end thereof cut away to permit passage of the needleand having a hook at one end of the recess to enter and spread the loopof needlethread are not broadly claimed herein, as they form thesubject-matter of and are claimed in another application, Serial No.587,183, filed by me April 11, 1896.

Having fully described my invention, what I claim, and desire to secureby Letters Patent, is

1. In a machine of the class described, stitchforming devices, includinga bobbincarrier having an eccentric thread-delivery opening in its face,to draw oif a fixed quantity of bobbin-thread, a bobbin, and alocking-flnger movable toward and from the carrier-face, to clamp thebobbin-thread thereon at predetermined times and prevent its delivery,substantially as described.

2. A discoidal bobbin-carrier, consisting of a fixed circular end and aremovable circular end, an axial bobbin-support on said fixed end, anannular wall connecting and inwardly flared from each of said ends, anon-eontinuous rearwardly-extended flange on said wall, a hook on oneend of said flange, and a retaining device for the removable endindependent of said end, substantially as described.

3. A discoidal bobbin-carrier, consisting of a fixed circular end and aremovable circular end, an axial bobbin-support on said fixed end, anannular wall connecting and inwardly flared from each of said ends, anoncontinuous rearwardly-extended flange on said wall, a hook having apoint 7t, and a retaining device for the removable end having a threaddelivery opening therein eccentric to the axis of the carrier,substantially as described.

-i. A discoidal bobbin-carrier having a fixed end, an axialbobbin-support thereon, a b0b bin, means to control its rotation on saidsupport, a removable end for the carrier, and a removable thread-guidewithin the carrier at one side of the bobbin, substantially asdescribed.

5. Adiscoidal bobbin-carrierhaving afixed end, an axial bobbin-supportthereon, abobbin, means to control its rotation on said support, aremovable end for the carrier, and a retaining device therefor having athreadguide to enter the carrier at one side the bob bin, and athread-delivery opening in said retaining device eccentric to thecarrier-axis, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

, LOUIS GODDU. lVitnesses:

GEO. W. GREGORY, JOHN C. EDWARDS.

ICC

